CN113492785A - Occupant protection device - Google Patents
Occupant protection device Download PDFInfo
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- CN113492785A CN113492785A CN202110270935.1A CN202110270935A CN113492785A CN 113492785 A CN113492785 A CN 113492785A CN 202110270935 A CN202110270935 A CN 202110270935A CN 113492785 A CN113492785 A CN 113492785A
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- vehicle
- airbag device
- battery
- rollover
- electric power
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/017—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including arrangements for providing electric power to safety arrangements or their actuating means, e.g. to pyrotechnic fuses or electro-mechanic valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0136—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to actual contact with an obstacle, e.g. to vehicle deformation, bumper displacement or bumper velocity relative to the vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/13—Roll-over protection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/02—Occupant safety arrangements or fittings, e.g. crash pads
- B60R21/16—Inflatable occupant restraints or confinements designed to inflate upon impact or impending impact, e.g. air bags
- B60R21/23—Inflatable members
- B60R21/231—Inflatable members characterised by their shape, construction or spatial configuration
- B60R21/23138—Inflatable members characterised by their shape, construction or spatial configuration specially adapted for side protection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0002—Type of accident
- B60R2021/0004—Frontal collision
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0002—Type of accident
- B60R2021/0006—Lateral collision
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R2021/0002—Type of accident
- B60R2021/0018—Roll-over
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01122—Prevention of malfunction
- B60R2021/01129—Problems or faults
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R2021/01122—Prevention of malfunction
- B60R2021/01184—Fault detection or diagnostic circuits
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Bags (AREA)
Abstract
The invention provides an occupant protection device which can realize miniaturization and low cost of components. An occupant protection device (1) is provided with: a rollover airbag device (50) that is provided in the vehicle interior; a battery (14) that supplies electric power to the rollover airbag device (50); a control unit (20) that determines a rollover of the vehicle, and, when it is determined that the vehicle has rolled over, activates the rollover airbag device (50) using the electric power supplied from the battery (14); and a capacitor (23) that stores electric power used when the battery (14) fails, wherein the control unit (20) determines a collision of the vehicle and diagnoses a failure of the battery (14), and when it is determined that the vehicle has collided and the battery (14) has failed, the control unit operates the rollover airbag device (50) using the electric power stored in the capacitor (23).
Description
Technical Field
The present invention relates to an occupant protection device.
Background
Patent document 1 describes a technique of providing a front collision airbag and a side collision airbag as an occupant protection device, particularly in a vehicle. The vehicle includes a capacitor as a backup power source for each airbag, and operates using power stored in the capacitor when power supply from a battery of the vehicle is interrupted.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 9-240417
Disclosure of Invention
Problems to be solved by the invention
Meanwhile, a rollover airbag is also currently provided in a vehicle. The time from the detection of the side rollover to the operation of the side rollover airbag is set longer than that of the front collision airbag and the side collision airbag. Therefore, the capacitor as the backup power source is required to have a large capacity, which leads to an increase in size and cost.
The present invention has been made in view of the above problems, and an object thereof is to provide an occupant protection device that can achieve a reduction in size and cost of components.
Means for solving the problems
In order to solve the above problem, an occupant protection device according to the present invention includes: a rollover airbag device provided in the vehicle interior; a battery capable of supplying electric power to the rollover airbag device; a control unit that determines a rollover of a vehicle and, when it is determined that the vehicle has rolled over, operates the rollover airbag device using electric power supplied from the battery; and a backup power supply that stores electric power used when the battery fails, wherein the control unit determines a collision of the vehicle and diagnoses a failure of the battery, and when it is determined that the vehicle has collided and the battery failure is diagnosed, the control unit operates the rollover airbag device using the electric power stored in the backup power supply.
Effects of the invention
According to the present invention, the size and cost of the backup power supply as a component can be reduced.
Drawings
Fig. 1 is a schematic view showing a vehicle to which an occupant protection apparatus of an embodiment of the present invention is applied.
Fig. 2 is a block diagram schematically showing an occupant protection device according to an embodiment of the present invention.
Fig. 3 is a flowchart for explaining an operation example of the occupant protection device according to the embodiment of the present invention.
Fig. 4 is a schematic diagram for explaining an operation example of the occupant protection device according to the embodiment of the present invention, and is a diagram showing a case where the battery is not broken down.
Fig. 5 is a schematic diagram for explaining an operation example of the occupant protection device according to the embodiment of the present invention, and is a diagram showing a case where a battery fails.
Description of the reference numerals
1 occupant protection device
14 cell
20 control part
23 capacitor (Standby power supply)
30. 30L, 30R air bag device for front collision
40. Airbag device for 40L, 40R side collision
50. 50L, 50R side turn airbag device
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, "front-rear" indicates a front-rear direction in a traveling direction of the vehicle, and "left-right" and "up-down" indicate a left-right direction (vehicle width direction) and an up-down direction, respectively, as viewed from a driver's seat.
As shown in fig. 1 and 2, an occupant protection device 1 according to an embodiment of the present invention is a device (System) for SRS (Supplemental Restraint System) that protects an occupant in a front collision, a side collision, a rollover, or the like of a vehicle C. The occupant protection device 1 includes an acceleration sensor 11, an acceleration sensor 12, a roll sensor 13, a battery 14, and a control unit 20. The occupant protection device 1 includes a pair of left and right front-collision airbag devices 30(30L, 30R), a pair of left and right side-collision airbag devices 40(40L, 40R), and a pair of left and right side-rollover airbag devices 50(50L, 50R).
< acceleration sensor (sensor for front collision detection) >)
As shown in fig. 2, the acceleration sensor 11 is a sensor that detects acceleration in the front-rear direction of the vehicle C. That is, the acceleration sensor 11 is an example of a front collision detection sensor for detecting a front collision (front collision) of the vehicle C. The detection result of the acceleration sensor 11 is output to the control unit 20.
< acceleration sensor (sensor for side impact detection) >)
The acceleration sensor 12 is a sensor that detects the lateral (left-right) acceleration of the vehicle C. That is, the acceleration sensor 12 is an example of a side impact detection sensor for detecting a side impact (side impact) of the vehicle C. The detection result of the acceleration sensor 12 is output to the control unit 20.
< roll sensor (sensor for rollover detection) >
The roll sensor 13 is a sensor that detects an angular velocity of the vehicle C about a roll axis (front-rear axis). That is, the roll sensor 13 is an example of a rollover detection sensor for detecting the rollover of the vehicle C. The detection result of the roll sensor 13 is output to the control unit 20.
The roll detection sensor is not limited to the roll sensor 13. The rollover detection sensor may be realized by a combination of an acceleration (gravity) sensor that detects the acceleration of the vehicle C in the vertical direction and a yaw rate sensor that detects the yaw rate of the vehicle C, for example.
< Battery >
The battery 14 is provided in the power compartment 2 of the vehicle C and is an electric power source capable of supplying electric power to the front-collision airbag device 30, the side-collision airbag device 40, the side-rollover airbag device 50, and the devices mounted on the vehicle C.
< control part >
The control Unit 20 is an ECU (Electrical control Unit) that controls each device in the occupant protection device 1. The control Unit 20 includes a CPU (Central Processing Unit), a ROM (Read-Only Memory), a RAM (Random Access Memory), an input/output circuit, and the like. The control unit 20 includes a failure diagnosis unit 21, a determination unit 22, and a capacitor 23 as functional units for the occupant protection device 1.
The failure diagnosis unit 21 diagnoses whether or not the battery 14 has failed by monitoring the voltage of the battery 14, for example, and outputs the diagnosis result to the determination unit 22.
The determination unit 22 acquires the detection results of the acceleration sensors 11 and 12 and the roll sensor 13, and determines whether the vehicle C is a front collision, a side collision, or a rollover based on the acquired detection results.
Specifically, the determination unit 22 determines that the vehicle C has a front collision when the detection result of the acceleration sensor 11 is negative and the absolute value thereof is equal to or greater than the threshold value. The determination unit 22 determines that the vehicle C has not collided with by a front collision when the detection result of the acceleration sensor 11 is positive and the absolute value thereof is equal to or greater than the threshold value, and when the absolute value of the detection result of the acceleration sensor 11 is lower than the threshold value.
The determination unit 22 determines that the vehicle C has a side impact when the absolute value of the detection result of the acceleration sensor 12 is equal to or greater than the threshold value, and determines that the vehicle C has no side impact when the absolute value of the detection result of the acceleration sensor 12 is less than the threshold value. The determination unit 22 can determine the direction of the side collision based on the positive and negative of the detection result of the acceleration sensor 12.
The determination unit 22 determines that the vehicle C is rolling when the absolute value of the detection result of the roll sensor 13 is equal to or greater than the threshold value, and determines that the vehicle C is not rolling when the absolute value of the detection result of the roll sensor 13 is less than the threshold value. The determination unit 22 can determine the direction of rollover based on the positive and negative values of the detection result of the roll sensor 13.
The determination unit 22 supplies electric power to at least one of the front airbag device 30(30L, 30R), the side airbag device 40(40L, 40R), and the side airbag device 50(50L, 50R) based on the determination result, and operates the corresponding airbag device 30, 40, 50. In the present embodiment, the determination unit 22 boosts the electric power stored in the battery 14 and supplies the boosted electric power to the airbag devices 30, 40, and 50 corresponding to the determination result.
< capacitor >
The capacitor 23 is an example of a backup power supply for the occupant protection device 1. The control unit 20 operates using the electric power stored in the capacitor 23 when the battery 14 fails, and supplies the electric power stored in the capacitor 23 to an operation-required device among the airbag devices 30, 40, and 50. Capacitor 23 may store electric power in advance when it is attached to control unit 20, or may store electric power from battery 14.
Airbag device for front collision
A pair of left and right front impact airbag devices 30(30L, 30R) are provided in the vehicle compartment 3, and serve as devices for protecting an occupant against a front impact. The pair of left and right front-collision airbag devices 30(30L, 30R) are housed in an instrument panel 4 (steering wheel or instrument panel) in front of the vehicle compartment 3, and perform a deployment operation between the instrument panel 4 and the occupant during a front collision.
As shown in fig. 2, the airbag device 30 for a front collision includes an inflator 31 and an airbag 32.
The inflator 31 is operated (ignited) by the electric power from the control portion 20 to generate gas in the airbag 32, thereby deploying the airbag 32. The determination unit 22 of the control unit 20 controls a switching circuit, not shown, to supply the electric power supplied from the battery 14 to the inflator 31 in a normal state and supply the electric power stored in the capacitor 23 to the inflator 31 in a failure of the battery 14.
Airbag device for side impact
As shown in fig. 1, a pair of left and right side impact airbag devices 40(40L, 40R) are provided in the vehicle compartment 3, and serve as devices for protecting an occupant against a side impact. The pair of left and right side-collision airbag devices 40L and 40R are accommodated in a seating surface of a front seat (driver seat and passenger seat) 5 of the vehicle interior 3, and perform a deployment operation between the side surface of the vehicle C and the occupant during a side collision.
As shown in fig. 2, the side impact airbag device 40 includes an inflator 41 and an airbag 42.
The inflator 41 is operated (ignited) by the electric power from the control portion 20 to generate gas in the airbag 42, thereby deploying the airbag 42. The determination unit 22 of the control unit 20 controls a switching circuit, not shown, to supply the electric power supplied from the battery 14 to the inflator 41 in a normal state and supply the electric power stored in the capacitor 23 to the inflator 41 in a failure of the battery 14.
Airbag device for side-turning
As shown in fig. 1, a pair of left and right rollover airbag devices 50(50L, 50R) are disposed in the vehicle compartment 3 and serve as devices for protecting an occupant against rollover. The pair of left and right rollover airbag devices 50(50L, 50R) are housed in the upper end portions (in the roof side rail of the vehicle compartment or in the interior member covering the roof side rail) 6 of the vehicle side surfaces, and perform deployment operation between the vehicle side surfaces and the heads of the occupants at the time of rollover.
As shown in fig. 2, the rollover airbag device 50 includes an inflator 51 and an airbag 52.
The inflator 51 is operated (ignited) by the electric power from the control portion 20 to generate gas in the airbag 52, thereby deploying the airbag 52. The determination unit 22 of the control unit 20 controls a switching circuit, not shown, to supply the electric power stored in the battery 14 to the inflator 51 during normal operation, and to supply the electric power stored in the capacitor 23 to the inflator 51 during failure of the battery 14.
Here, the front collision and the side collision of the vehicle C are detected by the acceleration sensors 11 and 12 relatively quickly, and the control unit 20 deploys the front airbag device 30 and the side airbag device 40 relatively quickly. On the other hand, the rollover of the vehicle C occurs slower than the front collision and the side collision, and the roll sensor 13 takes longer time to detect than the front collision and the side collision. The control unit 20 deploys the rollover airbag device 50 after the rollover detection. Therefore, the conventional capacitor 23 is designed to have a large capacity in order to ensure a long standby operation time of the rollover airbag device 50.
< example of action >
Next, an operation example of the occupant protection device 1 will be described with reference to fig. 3 and 4. First, in a normal traveling state, each of the airbag devices 30, 40, and 50 is in a state (an open state) in which it can operate using electric power supplied from the battery 14.
First, the determination unit 22 determines whether or not the vehicle C has a front collision and/or a side collision based on the detection results of the acceleration sensors 11 and 12 (step S1). If it is determined in step S1 that a collision has occurred, determination unit 22 diagnoses whether or not battery 14 has failed (step S2). When a failure is diagnosed in step S2, the determination unit 22 supplies the electric power stored in the capacitor 23 to the front airbag device 30, the side airbag device 40, and the rollover airbag device 50. As a result, the airbags 32 and 42 of the front and/or side airbag devices 30 and 40 and the airbag 52 of the rollover airbag device 50 are deployed at the same time or with a small time difference based on the electric power stored in the capacitor 23 (step S3).
On the other hand, when it is diagnosed in step S2 that the failure has not occurred, the determination unit 22 supplies the electric power stored in the battery 14 to the front airbag device 30 and/or the side airbag device 40. Thereby, the airbags 32, 42 of the front impact airbag device 30 and/or the side impact airbag device 40 are deployed using the electric power supplied from the battery 14 (step S4).
If it is determined in step S1 that no collision has occurred, determination unit 22 diagnoses whether or not battery 14 has failed (step S5).
After execution of step S4 and in the case where no failure is diagnosed in step S5, the determination portion 22 determines whether the vehicle C is rollover based on the detection result of the roll sensor 13 (step S6). When it is diagnosed in step S6 that the rollover has occurred, the determination unit 22 supplies the electric power stored in the battery 14 to the rollover airbag device 50. Thus, the airbag 52 of the rollover airbag device 50 is deployed using the electric power supplied from the battery 14 (step S7).
If it is determined in step S6 that rollover has not occurred, the process ends.
When it is diagnosed in step S5 that a failure has occurred, the present routine is ended. This is because, in this case, it is considered that the electric power stored in the capacitor 23 is consumed and the control unit 20 cannot operate after a sufficient time has elapsed after the failure of the battery 14.
As shown in fig. 4, at time t1When the vehicle C does not have a frontal collision and/or a side collision and the battery 14 does not have a failure, the supply of electric power from the battery 14 to the airbag devices 30, 40, and 50 is continued. And, at time t2When the vehicle C starts to roll over, the control unit 20 starts to turn over from time t2Time t after lapse of a predetermined time3The airbag 52 is deployed. The rollover airbag device 50 can be at time t3～t4During which the head of the occupant is protected.
On the other hand, as shown in FIG. 5, at time t1In the case where the vehicle C has a front collision and/or a side collision and the battery 14 fails, the supply of electric power from the battery 14 to the control unit 20 is cut off. The control unit 20 is operated by the electric power stored in the capacitor 23 at time t1The standby operation is performed during time t 3.
Here, in the case of the conventional technology, the capacitor 23 is designed to be able to correspond to the normal timing of occurrence of rollover (time t)2) To ensure the standby operation time until the rollover airbag device 50 is operated (time t)3)。
In contrast, the occupant protection device 1 omits the rollover determination in the case where the vehicle C is a front collision and/or a side collision and the battery 14 fails, and makes the rollover determination earlier (at time t) than when the rollover determination is made3Before) the rollover airbag device 50 is operated. It is preferable that the occupant protection device 1 omit the rollover determination in the case where the vehicle C has a frontal collision and/or a side collision and the battery 14 fails, and be synchronized with the front airbag device 30 and the side airbag device 40 (at time t)1T2) to operate the side-turning airbag device 50. With this configuration, the capacitance of the capacitor 23 can be reduced, and the size and cost of the component can be reduced.
In the example shown in fig. 4 and 5, the latest operation timing of the airbag devices 30 and 40 is set to the same time t as the normal rollover occurrence timing2But is not limited thereto.
An occupant protection device 1 according to an embodiment of the present invention includes: a rollover airbag device 50 provided in the vehicle interior 3; a battery 14 capable of supplying electric power to the rollover airbag device 50; a control unit 20 that determines a rollover of the vehicle C and, when it is determined that the vehicle C has rolled over, activates the rollover airbag device 50 using the electric power supplied from the battery 14; and a backup power source (capacitor 23) that stores electric power used when the battery 14 fails, wherein the control unit 20 determines a collision of the vehicle C and diagnoses the failure of the battery 14, and when it is determined that the vehicle C collides and the battery 14 fails, the control unit operates the rollover airbag device 50 using the electric power stored in the backup power source.
Therefore, the occupant protection device 1 can reduce the capacity of the backup power supply and can reduce the size and cost of the backup power supply (capacitor 23) that is a component, because the rollover airbag device 50 is operated without making a rollover determination at the time of failure of the battery 14.
In the occupant protection device 1, when the control unit 20 determines that the vehicle C collides and diagnoses that the battery 14 has failed, the rollover airbag device 50 is activated earlier than when it is determined that the vehicle C has rolled over.
Therefore, the occupant protection device 1 can reduce the capacity of the backup power supply and can reduce the size and cost of the backup power supply as components by operating the rollover airbag device 50 earlier when the battery 14 fails than when the rollover determination is performed when the battery 14 fails.
The occupant protection device 1 is characterized by including a front airbag device 30 and a side airbag device 40 provided in a vehicle compartment 3, wherein the control unit 20 operates the front airbag device 30 and/or the side airbag device 40 using electric power supplied from the battery 14 when it is determined that the vehicle C collides, and operates the side airbag device 50 simultaneously with the front airbag device 30 and/or the side airbag device 40 using electric power stored in the backup power supply when it is determined that the vehicle C collides and it is diagnosed that the battery 14 is broken.
According to this configuration, the occupant protection device 1 operates the front airbag device 30 and/or the side airbag device 40 and the rollover airbag device 50 without making a rollover determination when the battery 14 fails. Therefore, the occupant protection device 1 can reduce the capacity of the backup power supply by advancing the operation of the side-turning airbag device 50 (for example, operating the side-turning airbag device 40 simultaneously with or with a small time difference with the front-collision airbag device 30), and can achieve the downsizing and cost reduction of the backup power supply as the component.
While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be modified as appropriate within a range not departing from the gist of the present invention. For example, the backup power supply is not limited to the capacitor 23 installed in the control unit 20.
The rollover airbag device 50 may be a rollover airbag device for a side collision. With this configuration, when the control unit 20 of the occupant protection device 1 determines that a side collision has occurred in step S1, the side-airbag device 50 is operated as a side-collision airbag device in step S4. In this case, the present flow omits steps S6 and S7 after the execution of step S4.
Claims (3)
1. An occupant protection apparatus characterized by comprising:
a rollover airbag device provided in the vehicle interior;
a battery capable of supplying electric power to the rollover airbag device;
a control unit that determines a rollover of a vehicle and, when it is determined that the vehicle has rolled over, operates the rollover airbag device using electric power supplied from the battery; and
a backup power supply that accumulates electric power used in the event of a failure of the battery,
the control unit determines a collision of the vehicle and diagnoses a failure of the battery, and when it is determined that the vehicle has collided and the battery failure is diagnosed, operates the rollover airbag device using the electric power stored in the backup power supply.
2. The occupant protection apparatus according to claim 1,
the control unit operates the rollover airbag device earlier when it is determined that the vehicle has collided and the battery failure is diagnosed than when it is determined that the vehicle has rolled over.
3. The occupant protection apparatus according to claim 1 or 2,
comprises a front collision airbag device and a side collision airbag device arranged in a vehicle chamber,
the control unit operates the front airbag device and/or the side airbag device using the electric power supplied from the battery when it is determined that the vehicle has collided,
when it is determined that the vehicle has collided and the battery failure is diagnosed, the front airbag device and/or the side airbag devices and the side airbag device are operated using the electric power stored in the backup power supply.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020047578A JP7384717B2 (en) | 2020-03-18 | 2020-03-18 | Occupant protection device |
| JP2020-047578 | 2020-03-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113492785A true CN113492785A (en) | 2021-10-12 |
| CN113492785B CN113492785B (en) | 2023-06-20 |
Family
ID=77747433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110270935.1A Active CN113492785B (en) | 2020-03-18 | 2021-03-12 | Occupant protection device |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US11414034B2 (en) |
| JP (1) | JP7384717B2 (en) |
| CN (1) | CN113492785B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023039626A (en) | 2021-09-09 | 2023-03-22 | 日立Astemo株式会社 | On-vehicle processing device, vehicle control device and self-position estimation method |
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| JP2004284448A (en) * | 2003-03-20 | 2004-10-14 | Denso Corp | Occupant protective device |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20210291769A1 (en) | 2021-09-23 |
| CN113492785B (en) | 2023-06-20 |
| US11414034B2 (en) | 2022-08-16 |
| JP7384717B2 (en) | 2023-11-21 |
| JP2021146844A (en) | 2021-09-27 |
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